pursell



Nov. 14, 1950A P. B. BURSELL 2,530,177

OVEN y Filed may 5, 1947 3 sheets-Sheet 2 :inventor Phl/ B.- Pursel/ M f amnn attorneys Nov. 144, i950- P. B. PuRsELL. 2,530,177

` `OVEN Filed may 5, 1947 s sheets-sheets nventor Gtorneg s Patented Nov. 14, 1950 UNITED STATES PATENT OFFICE? Phil B. Pursell, KansasCity, Kans. kApplication May 5, 1947, Serial No. 745,981

l over too wide a range to establish a uniform supply of combustion supporting air. Furthermore, the air near most oors is subject to constant drafts which also causes fluctuation of the burner flames and variation in oven temperatures.

It is, therefore, the principal purpose of the present invention to provide a baking oven with a constant uniform flow of air to the burners without interference by floor drafts and fluctuating room temperatures.

Other objects of the invention are to provide for uniform distribution of air to the burners and to provide for supplying the burners with preheated air maintained at a substantially uniform temperature by heat loss through the top of the oven and flue vent.

In accomplishing these and other objects of the invention I have provided improved structure, the preferred forni of which is illustrated in the accompanying drawings wherein:

Fig. l is a perspective view of a baking oven constructed in accordance with the present invention.

Fig. 2 is a horizontal section through the oven on the line 2 2 of Fig. 1.

Fig. 3 is a vertical section through the rear portion of the oven particularly illustrating the arrangement for supplying preheated combustion supporting air to the burners,

Fig. 4 is a fragmentary perspective view of the upper portion of the oven and air supply duct.

Fig. 5 is a similar fragmentary perspective view of' the lower portion of the oven and air supply duct.

Referring more in detail to the drawings:

I designates a baking oven constructed in accordance with the present invention and which includes end walls 2 3, front wall 4 having the usual door openings (not shown), a rear wall 5, and a top 6.

The walls and top are formed by inner and outer sheet metal panels i and 8 that are secured in spaced relation by angle iron frame members 9 and I0 with the space therebetween lled with a suitable insulation I'l The outer angle vmembers of the side walls are supported o-n angles l2 carried on channels I3, the channels being arranged with one of their flanges I4 for support on the floor while the -oth'eranges [5T carryftheangk l2. The web portions I6 of the channels are preferably located in the plane of the outer sheets and the outer sheets extend downwardly along the outer face sides of the Webs to near the oor as shown in Fig. 5. The Yinsulation spaces between the inner and outer sheets are closed above the upper flanges of the channels by plates l1 and the inner sheets 8 terminate at substantially the level of the upper anges of the channels and are supported on angles I8.

The bottom area enclosed by the wallsof the oven is covered by insulation I9 that is supported on the oor as shown in Figs. 3 and 5. The outer sheets of the top and side walls of the oven are connected with angles 29 that are supported by the vertical angles I. Extending across the bottom and having support on inturned anges of the angles I8 are plates 2l closing the space between the burner assemblies 22 that extend across the oven in parallel relation with the front and rear walls. The burner assemblies include angles 23 and 24 that are spaced apart on the respective sides of the burners 25 to provide for air flow from the bottom space Z6 to the burners, the air being directed by wings 21 and 28 extending from the flanges upwardly toward the burner as shown in Fig. 3. K

The oven illustrated is shown as provided with a reel 29 having trays 3B for supporting the articles to be baked in the oven. The heat from the burners circulates upwardly around the reel and is vented thro-ugh a passageway 3l into a vent chamber 32 that is formed by a partition 33 extending diagonally across the upper rear corner of the oven from the inner sheet of the front wall to a point spaced from the inner sheet of the rear wall. The vent chamber in turn is vented through a duct 34 carried by the top of the oven. Air is supplied to the air space under the burners in accordance with the present invention through a series of openings 35 located along the length of the oven and extending through the outer sheet 8 and the web l of the rear channel as shown in Fig. 5.

In order to avoid floor drafts and to provide the air at substantially uniform temperature, the rear wall of the oven cooperates with a sheet metal Wall 36 to form a duct 31 over the entire area of the rear wall of the oven as best shown in Figs. 1 and 2. The wall 36 includes sheet metal plates 38 that are secured at the vertical edges to vertical angles 39 having their upper ends anchored to the rear wall of the oven by angleshaped clips 40, the clips having one leg 4I welded to the outer sheet and the other leg 42 to angles 39. The lower ends of the angles are supported on a horizontally-arranged angle 43 supported on the floor and having an inturned flange 44 secured to legs 45 of angle clips 46 that have legs 41 attached to the outer sheet of the rear wall of the oven near the lower edge thereof as shown in Fig. 4. The sheets 38 project above the top of the oven and terminate in inwardly extending flanges 48 that are spaced above the top of the oven to provide an air inlet 49 extending along the length of the oven whereby preheated air from the top of the oven is drawn through the opening 49 and moved downwardly of the duct to be distributed through the inlets 35 into the air supply chamber at the bottom of the oven responsive to draft and operation of the burner. It is thus obvious that the air supply to the burner is in no way affected by oor drafts or oor temperatures, so that the burners operate with a, steady even name and provide substantially constant uniform heat in the oven chamber, the air at the top of the oven being sufficiently warm through operation of the oven to permit a supply of preheated air to the burners to promote efciency thereof and maintain a more uniform temperature in the oven chamber.

What I claim and desire to secure by Letters Patent is:

An oven including vertical Walls and a top, a base supporting the vertical walls and having a series of air distributing openings extending along one of the vertical walls, burners extending across the base, means closing the space between the burners and vertical walls to provide an air chamber connected with said openings for supplying combustion supporting air to the burners, vertical frame members supported by said wall, metal sheets xed to the frame members and having upper ends projecting over and above the oven top to provide a duct for conducting air from over the oven top to said air distributing openings in said wall from said base to the top' of said oven to prevent heating of the air while moving through said duct.

PHIL B. PURSELL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,943,053 Boisset Jan. 9. 1934 FOREIGN' PATENTS Number Country Date 136 Great Britain Jan. 10, 1882 14,831 Great Britain Sept. 19, 1890 166,484 Great Britain July 21, 1921 

